試(shi)驗(yan)(yan)一般在(zai)10-35℃室(shi)溫范(fan)圍內進(jin)行(xing)。對溫度(du)(du)要(yao)求嚴(yan)格的(de)試(shi)驗(yan)(yan)。試(shi)驗(yan)(yan)室(shi)溫度(du)(du)應(ying)(ying)在(zai)23±5℃。試(shi)驗(yan)(yan)在(zai)力(li)作用下彎(wan)曲的(de)二臂應(ying)(ying)平行(xing)，支(zhi)(zhi)輥長(chang)度(du)(du)應(ying)(ying)大開試(shi)件的(de)寬度(du)(du)或直徑。支(zhi)(zhi)輥的(de)間(jian)距(ju)應(ying)(ying)為l=(d+3a)±0.5a此距(ju)離在(zai)試(shi)驗(yan)(yan)之間(jian)應(ying)(ying)保持(chi)不變。均勻加荷彎(wan)曲至規(gui)定(ding)(ding)的(de)角度(du)(du)，試(shi)驗(yan)(yan)結果評(ping)定(ding)(ding)，應(ying)(ying)按照相(xiang)關產品標準的(de)要(yao)求評(ping)定(ding)(ding)彎(wan)曲試(shi)驗(yan)(yan)結果。如果規(gui)定(ding)(ding)無具體要(yao)求，彎(wan)曲試(shi)驗(yan)(yan)后試(shi)件彎(wan)曲的(de)外表面無可見裂紋(wen)應(ying)(ying)評(ping)定(ding)(ding)為合格。